<template>
  <view>
<view class="search-box" >
  <uni-search-bar @confirm="search" @input="input" :radius="100" cancelButton="none"></uni-search-bar>
</view>
<view class="sugg-list" v-if="searchResults.length !==0">
  <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
    <view class="goods_name">{{item.goods_name}} </view>
      <uni-icons type="arrowright" size="16"></uni-icons>
</view>
  </view>
  <view class="history-box" v-else>
    <view class="history-title">
      <text>搜索历史</text>
      <uni-icons type="trash" size="17" @click="clean"></uni-icons> 
        </view>
    <view class="history-list">
      <uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
  
    </view>
  </view>
</view>
</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        kw:'',
        //搜索的结果列表
        searchResults:[],
        //搜索历史的数组
        historyList:[]
      };
    },
    onLoad(){
     this.historyList= JSON.parse( uni.getStorageSync('kw') || '[]')
    },
    methods:{
    input(e){
      clearTimeout(this.timer)
    this.timer = setTimeout(()=>{
      this.kw = e
      this.getSeachList()
     },500)
    },
  async  getSeachList(){
      //判断搜索词是否为空
      if(this.kw.length === 0){
        this.searchResults=[]
        return 
      }
    const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch', {query: this.kw})
    if(res.meta.status!==200) return uni.$showMsg()
    this.searchResults = res.message
    this.saveSearchHistory()
    },
    gotoDetail(item){
      uni.navigateTo({
        url:'/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
      })
    },
    saveSearchHistory(){
     const set = new Set(this.historyList)
     set.delete(this.kw)
     set.add(this.kw)
     this.historyList = Array.from(set)
     //对搜索历史数据，进行持久性的存储
     uni.setStorageSync('kw',JSON.stringify(this.historyList))
     },
     clean(){
       this.historyList = []
       uni.setStorageSync('kw','[]')
     },
     gotoGoodsList(kw){
       uni.navigateTo({
         url:'/subpkg/goods_list/goods_list?query=' + kw
       })
     }
    },
    computed:{
      histories(){
       return  [...this.historyList].reverse()
      }
    }
  }
</script>

<style lang="scss">
.search-box{
  position: sticky;
  top: 0;
  z-index: 99;
}
.sugg-list{
  padding: 0 5px;
.sugg-item{
  font-size: 12px;
  padding: 13px 0;
  border-bottom: 1px solid #efefef;
  display:flex;
  align-items: center;
  justify-content: space-between;
  .goods_name{
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 3px;
  }
  }
}
.history-box{
    padding: 0 5px;
    .history-title{
      display: flex;
      justify-content: space-between;
      height: 40px;
      align-items: center;
      font-size: 13px;
      border-bottom: 1px solid #efefef;
    }
    .history-list{
      display: flex;
      flex-wrap: wrap;
      .uni-tag{
        display: inline-block;
        margin-top: 5px;
        margin-right: 5px;
      }
    }
}

</style>
